mybatis-plus的版本號是 2.0.1,在調用自身的insert(T)的時候沒有報錯，但是執行update報錯，調用selectById、deleteById的時候也報錯。也就是涉及到需要主鍵識別的都報錯。

語句如下:(接口與實現都是MP自己實現的)

        User selectById = userMapper1.selectById("ceshi");
        userMapper1.deleteById("ceshi");

報錯信息如下:

org.apache.ibatis.binding.BindingException: Invalid bound statement (not found): cn.xm.jwxt.ceshi.mapper.UserMapper.deleteById
    at org.apache.ibatis.binding.MapperMethod$SqlCommand.
 
<init>(MapperMethod.java:230)
    at org.apache.ibatis.binding.MapperMethod.<init>(MapperMethod.java:48)
    at org.apache.ibatis.binding.MapperProxy.cachedMapperMethod(MapperProxy.java:65)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58)
    at com.sun.proxy.$Proxy18.deleteById(Unknown Source)
    at cn.xm.jwxt.ceshi.MpTest.test1(MpTest.java:
 
30)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:
 
606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:254)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

原因:如果是自己手寫的接口，沒寫SQL或者說是SQL的XML的namespace寫錯的話可以找出原因，可是這是MP自己實現的，自己都沒動接口。

　　經檢查，在實體類中，不對主鍵字段添加 @TableId("數據庫字段名稱") 註解的話，在調用涉及id的自帶方法時就出現此錯誤。估計是mybatis-plus無法識別主鍵字段。

解決辦法：聲明數據庫的主鍵列名稱就可以了

所以，建議如果使用Mybatis-Plus的話，最好在實體類中詳細註解好表名稱(@TableName)、表主鍵(@TableId)，以免出現這種很難找到原因的錯誤。
另：據說新版本mybatis-plus已經解決此問題

mybatis-plus調用自身的 selectById 方法報錯:org.apache.ibatis.binding.BindingException: